Furnace



June 3 1924.

C. M. PALMER FURNACE Filed Jan. 24

*HGQGGO Patented June 3, 1924.

UNITE@ 'STIS tetris CHESTER M. PALMER, OI` AURORA, ILLINOIS.

FUR/NACE.

Application filed January 24, 1921. SerialV No. 439,673.

To all whom t may concern.'

Be it known that I, CHESTER M. PALMER,

a citizen of the United States, residing at Aurora, in the county of Kane and State of Illinois, have invented a new and useful Furnace, of which the fol-lowing is a specification.

My invention relates to improvements in that class of furnaces which combine a fuel distilling chamber disposedabove the furnace grate, and adapted to be heated by the furnace fire,`and a flue, or free passageway for conducting gases from said chamber to the under face of the furnace grate and the objects of my invention are lst- To provide a fuel distilling chamber of such form as will permit thev heating fuel within said chamber to expand without compression, or clogging its downward passage to the iirebed upon the furnace grate.

2nd-To provide a fuel distilling chamber of such form as will prevent gases within said chamber from flowing between said chamber wall and the fuel bed directly to the combustion chamber.

3rd-To provide a flue o r fieevpassageway for conducting gases from said fuel distilling .chamber to the under face of the furnace grate, said flue disposed centrally of said chamber and lhaving communication therewith at vertically separated points.

I attain these objects by the mechanism illustrated in the accompanying drawings;

in which- Figure 1 is a vertical section of the entire furnace, and Figure 2 isa section through the line x-m.

In the device illustrated in the accompanying drawings my improvements are shown embodied in an ordinary upright cylindrical type of furnace 'orstovercombining a iire grate, a combustion chamber, and an enclosedchamber or ash pit beneath said fire grate. Y

In the drawings l represents a cylindrical furnace casing which is supported at its lower end upon a suitable base 2 which forms an enclosed chamber A beneath the fire grate 3; a door l0 is provided for the removal of ashes.

5 represents the top part of the furnaceY casing which is supported upon the upper end of the casing l and is provided with a flue opening 6 Vfor the passage of consumed gases from the combustion chamber C to the atmosphere, and the door 7 is adapted foi` feeding' fuel to the'distilling chamber VB, and also for the admission' of a normal air supply lto the furnacel fire. t

A Vchamber or magazine B which is adapted to hold a fuel bed in position to be heated bythe furnace fire to separate the volatile from thessolid part of the fuelwhile within said chamber, is provided'by the wall l8 which is shown ofsubstantially a Vdouble frustro-'conical form, and suspended from the under face of the furnace top 5, concentrically with the casing 1, it extends down to within a short distance of the grate 3,7providing a free space between the lower end'of said wall Sand the grate 3, forthe furnace fire bed. The upper portion of Said,

wall 8 is formed'to gradually enlarge the chamber Bdownwardly to permit tlie heating fuel within said chamber to expand without clogging its downward feed to the fire bed, and the lower'end of said wall 8 lis inclined or 'curved' inwardly to they fuel opening at the bottom of the chamber B to Y provide close engagement of the lowerpart of the wall with the fuel vbed wherebygases arey 4prevented from flowing 'between said wall and fuel bed tothe combustion chamber.

The perforations in the fine l1, which is shown suspended on a rod 12, concentrically of the wall 8V, and extends down' through a central openingl inthe grate 3, provides horizontal communication with the 'chamber'B at diHei-ent points, and thereby a free passageway forgases from the Iupper portion of said chamber and from different points throughout the depth of a fuel bed withinA saidvchamber to the under faceof the grate 3; said' flue ll also provides a free passageway for the air draft through the opening in the doory toy the under face ofthe grate 3, as a normal air supply for the furnace fire. In theoperationy of the furnace a lire is first provided. upon the` furnace Agrate 3.' The fuel distilling 'chamber B is thenI filled with a finely crushed fuelor soft coal screenings that will form a compact mass which will prevent an air draft from flowing through the green fuel bed. The consumed gases from the fire bed upon the grate 3 in passing out through the flue opening V6 y to the atmosphere produces an air draft inward through the opening in the door 7 and t downward through the perforated flue 11, to the under face of the grate 3 and then in passing upward through the grate 3, provides a normal air supply to the furnace fire.

The compact green fuel bed and its close engagement with the lower end of the fuel distilling chamberwall prevent an air draft or gases from flowing out through the opening in the lower end of the chamber B, directly to the combustion chamber. The fuel within the chamber B is heated by the furnace lire thereby separating the volatile part from the solid part ofthe fuel while within said chamber B, the volatile part flows from the fuel bed directly to the flue 11, through the perforations provided in said flue, and there mingles with the air draft forming a combustive mixture which is consumed in passing through the furnace fire bed and the solid part of the fuel gradually feeds downward through the opening in the lower end of the chamber B, directly to the fire bed upon the grate 3, thereby providing a continuous fuel supply to the furnace lire.

The upper portion of the chamber B, is formed gradually larger from the top downward to permit the heating fuel Within said chamber B to expand without compression, or clogging of the fuel within said chamber and the lower portionrof said chamber is contracted, or the lower end of the chamber wall 8 is curved inwardly to provide close engagement with the fuel thereby preventing an air draft or gases from flowing out through the opening in the lower end of the chamber B directly to the combustion chamber C.

lhat I claim and desire to secure by Letters Patent is: y

1. In a furnace the combination with a combustion chamber, a grate adapted to support a fire bed, and an enclosed ash pit beneath said grate, of a fuel chamber wall of substantially a double frustro-conical form disposed vertically above said grate, providing space for the lire bed between the lower end of said wall and grate, said wall adapted to hold a fuel bed in position to be heated by the furnace fire, a vertical flue disposed kconcentrieally with said fuel chamber wall and leading downwardly to said grate, said flue having horizontal coin- Amunication with said fuel chamber whereby a free passageway for gases may be provided from the upper portion of said fuel chamber and from different points throughout the depth of a fuel bed within said chamber to the under face of said grate, and an opening from the atmosphere to the upper portion of said flue, all substantially as set forth.

2. In a furnace, the combination with a. combustion chamber a grate adapted to support a tire bed, an enclosed pit beneath said grate and a fuel chamber wall adapted to hold a fuel bed in position to be heated by the furnace fire, disposed vertically above said grate, providing space between the lower end of said wall and said grate for the furnace fire bed, the upper portion of said wall formed to gradually enlarge said fuel chamber downwardly, and the lower end of said wall inclined or curved inwardly to a fuel opening from said chamber downwardly to said grate, of a flue leading from the upper portion of said fuel chamber to said grate, said flue having horizontal communication with said fuel chamber whereby a free passageway for gases may be provided from the upper portion of said chamber and from different points throughout the depths of a fuel bed within said chamber to the under face of said grate all substantially as setA forth.

3. A. furnace comprising a combustion chamber, a grate adapted to support a lire bed, an enclosed ash pit beneath said grate, a fuel chamber wall adapted to hold a fuel bed in position to be heated by the furnace fire disposed vertically above said grate,

providing a free space between the lower end of said wall and said grate for the furnace fire bed, the upper portion of said wall formed to gradually enlarge said fuel chamber downwardl and the lower portion of said wall inclined or curved inwardly to a fuel opening from said fuel chamber to said grate, a flue leading from the upper portion of said fuel chamber to said grate, said flue having horizontal communication with said fuel chamber, whereby a free passageway for gases may be provided from the upper portion of said fuel chamber, and from different points throughout the depth of a fuel bed within said chamber to the under face of said grate, and an opening from the atmosphere to the upper portion of saidflue, all substantially as set forth.

CHESTER M. PALMER. 

